Many people once fondly remembered Barcelona Dream Team II at its peak.
The attacking trio of Ronaldinho, Su Dong, and Messi, along with the midfield iron triangle of Deco, Xavi, and Marcos Senna—these were dream lineups that countless Barcelona fans, and even fans of other clubs, yearned for.
But only someone like Su Dong, who had played for Barcelona, truly understood that Deco and Xavi were not the best possible midfield pairing. Instead, Iniesta and Xavi complemented each other more naturally.
Xavi was the team's metronome and the core of its midfield organization. He was responsible for sorting out and linking the play, possessed a superb long pass, and could also shake off his marker.
Iniesta was outstanding at carrying the ball forward, and his final pass was extremely sharp. He linked up beautifully with the forwards, was exceptionally good at breaking through in tight spaces, but was relatively slow.
Marcos Senna was primarily responsible for sweeping up and providing support. His ability to receive and distribute the ball was also excellent.
That was more or less how the midfield iron triangle divided up its duties, giving Barcelona's midfield attack greater depth and a wider range of options.
If Iniesta were replaced with Deco, the threat at both ends of the pitch might perhaps be greater, but the midfield's ball control, progression, and final pass would all suffer.
In fact, with Xavi, Iniesta, and Marcos Senna together, Spain's national team also achieved astonishing results, winning the European Cup and quite possibly lifting the World Cup the following year.
In modern football systems, players' roles on the pitch had become increasingly well-defined. Pirlo needed a Gattuso beside him, while Xavi was best paired with Iniesta, not Deco.
From that perspective, the iron-triangle partnership of Xavi, Iniesta, and Marcos Senna could be